Casting apparatus



Sept. 3, 1929. 11F, BMLY 1,727,191

' CASTING APPARATUS Filed )lay 18, 1926 (a J l JW 1 Z'ifal'ly ML yPatented Sept. 3, 1929.

UNITED STATES THADDEUS F. BAILY,

OF ALLIANCE, OHIO.

CASTING APPARATUS.

Application led May 1.8,

The invention relates to the casting, from molten metal, of articles ofuniform cross section throughout their length, and more particularly towhat might be termed a continuous casting operation, as articles of anydesired length may be cast without any Change in the apparatus.

The object of the improvement is to provide an apparatus having a die ofsubstan tially the cross sectional shape to be produced in the castarticle and which may be provided with a core to produce tubularcastings, the lower portion of the die opening into acrucibleof molt-cnmetal which may be forced coi'itinuously upward through the die by meansof fluid pressure upon the top of the metal.

An embodiment of the invention is illustrated in the accompanyingdrawing, 1n

which i Figure 1 1s a vertical sectional v1eW through the improvedcasting apparatus,

designed for casting tubular sections; and

Fig. 2, a fragmentary vertical section showing the apparatus designedfor Casting solid sections.

The apparatus comprisesa Crucible of suitable size to contain the amountof molten metal necessary to produce castings of the desired length,which Crucible may comprise the metal shell 1 and top and bottom plates2 and 3, within which is located the refractory lining 4, insulated fromthe metal outer walls as by anysuitable heat. insulating materialindicated at 5. j

This Crucible is adapted to contain molten metal, as indicated at (i inthe drawing, which may be poured into the Crucible from time to time byremoving the screw plug 7, from the feed opening 8, in the top of theCrucible.

The Crucible is gas tight, the cover and bottom plates being providedwith gaskets a which are clamped to the screw rings 8", thus tightlysealing the joints between the top and bottom walls and the side wallsof the Crucible.

The die 9, which is preferably formed of graphite or similar heatresisting material, haslthe central opening of substantially the crosssectional shape to be produced in the cast article, and, where,as in thepresent case, it is desired to cast tubular articles, a core 10, of thesame material as the die, is mounted with-in the central opening of thedie and spaced therefrom.

Both the die and core are preferably 1o- 1926. Serial No. 109,864.

cated in vertical position and extend from the bottom ofthe Crucible toa point spaced above the top thereof and are both held against verticalmovement.

The core is fixed at its lower end, below the point of solidification ofthe article being cast, to the bottom of the Crucible lining 4, asindicated at 11, or the core may be fixed to the lower end of the diewhich is itself held against Vertical movement as will be laterdescribed.

For the purpose of fixing the die against vertical movement, and also toprovide means for admitting air under pressure to the Crucible, a sleeve12 may surround the die, in spaced relation thereto and be connected atits lower end, as by the screw threads 13, to the cover plate of theCrucible.

The upper end of the jacket 19 may receive the flanged threaded 'cap 14,provided with a gasket 15, of asbestos or the like, for engaofement withthe upper end of the die, thus lholding the same against upward movementwith relation to the Crucible.

This sleeve 12 may be provided, intermediate its ends, with a T coupling16, to which is connected a pipe 17 communicating with any suitablesource of fluid under pressure.

The die 9 is provided, near its lower end, with openings 18 to admit themolten metal under pressure, and for the purpose of compensating forshrinkage of the cast tube as it solidifies, the upper portion of thecore is tapered as shown on the drawing.

For the purpose of more quickly solidifying the metal, as it is forcedthrough the die, any suitable cooling apparatus,esuch as the waterjacket 19, may surround the upper portion of the die above the level ofthe Crucible.

In operating the apparatus, to produce castings of uniform Crosssection, and of any desired length, the Crucible is filled with moltenmetal, as indicated in the drawing, and fluid under pressure isadmitted, from the pipe 17, into the upper end of the crucible, the

fluid pressure forcing the molten metal downward in the Crucible andthrough the openings 18, in the lower end of the die, forcing the metalcontinuously upward through the die, the cast metal solidifying as itpasses upward through the die and being continuously cooled asl itpasses' through the portion of the die surrounded by the water jacket.

As the casting emerges from the upper end of the die it is sufficientlysolidified and cooled to be handled in any well known manner to Carrythe same away from the die. It will be seen that castings of any desiredlength may.

be produced with this apparatus, the length of the Casting being limitedonly by the amount of molten metal supplied to the crucible, and as thismolten metal may be replenthe casting, as the metalcools first at theoutside and the molten interior is continually supported at its lowerend by molten metal under pressure, thus maintaining pressure upon theinterior of the casting until the same solidifies, as illustrated inFig. 2.

I Claim: y

1. An apparatus for casting metal of uniform Cross section comprising aCrucible adapted to contain molten metal, a die having its lower endopening into the Crucible below the level of the molten metal, a corelocated in spaced relation within the interior of the die and means forcontinuously forcing molten metal under, pressure upward through the dieand around the Core` by Huid pressure upon the top of the metal.

2. An apparatus for casting metal of uniform cross section comprising aCrucible adapted to contain molten metal, a die having its lower endopening into the crucible below the level of the molten metal, a taperedcore located in spaced relation within the interior of the die and meansvfor continuously forcing molten metal under pressure upwardv throughthe die and around the Core.

3. n apparatus for castingl metal of uniform cross section Comprising acrucible adapted to contain molten metal, a die having its lower endopening into the' Crucible, a tapered core located in spaced relationwithin the interior of the die, means for` continuously forcing molten,,metal under pressure upward through the die and around the Core andmeans for cooling the met-al as it passes through the die.

.4. An apparatus for Casting metal of uniform cross section comprisinga' Crucible adapted to Contain molten metal, a die formed of graphiteand having its lower end opening into the Crucible below the level ofthe molten metal and means for continuously forcing molten metal underpressure upward through the die by Huid pressure upon the top of themetal.

5. An apparatus for casting metal of uniform Cross section comprising aCrucible adapted to contain molten metal, a die formed of graphitehaving its lower end opening into the Crucible below the level of themolten metal, a core formed of graphite located in spaced relationwithin the interior of the die and means for continuously forcing moltennietal under pressure upward through the' die and around the core byHuid pressure upon the top of the metal.

6. An apparatus for casting metal of uniform cross section comprising aCrucible adapted to contain molten metal, a die formed of carbonaceousmaterial and having its lower end opening into the Crucible below thelevel of the molten metal and means for continuously. forcing moltenmetal under' pressure upward through the die by fluid pressure upon thetop of the metal.

7. An apparatus for Casting metal of uni. form cross section comprisinga Crucible adapted to contain molten metal, a die formed of heatresisting material and having its lower end opening into -the Cruciblebelow the level of the molten metal and means for Continu-V ouslyforcing molten metal under pressure upward through the. die by `fluidpressure upon thetop of the metal. l

In testimony that I claim the above, I have hereunto subscribed my name.

l THADDES F. Blum'.

